wiihacks account problem

ok well i was playing my wii and i had my girl freind sign me up to this site and i realy like it (great site and good job to the makers) any way she made the account in the name momma and im a BOY!!!!!!!!!!!! so i realy want to change the name how can i do this ??? or can a admin do it for me if so let me know and ill tell you what i want my name to be please and thank you